Don't try this at home;!..
 

Enjoy....

http://dailymotion.alice.it/video/x3...pe-triode_tech
--
Tony Sayer

Don't try this at home;!..
 

"tony sayer" wrote in message
...


Enjoy....

http://dailymotion.alice.it/video/x3...pe-triode_tech
--
Tony Sayer



Thanks for posting that Tony - it was, as they say, *cooler than the other
side of the pillow*..!!

Don't try this at home;!..
 

tony sayer wrote:

Enjoy....

http://dailymotion.alice.it/video/x3...pe-triode_tech

**Outstanding! Those whacky Frogs.

One question:

Why the yellow flame, before the blue flame on the glass?

Trevor Wilson

--
Posted via a free Usenet account from http://www.teranews.com

Don't try this at home;!..
 

On Sun, 06 Jan 2008 19:04:41 +1100, Trevor Wilson
wrote:

tony sayer wrote:

Enjoy....

http://dailymotion.alice.it/video/x3...pe-triode_tech

**Outstanding! Those whacky Frogs.

One question:

Why the yellow flame, before the blue flame on the glass?

So as not to crack the glass through too-intense local heating. Much
less risk if you bring it all up to a fairly high temperature before
getting serious with one bit.

d

--
Pearce Consulting
http://www.pearce.uk.com

Don't try this at home;!..
 

Don Pearce wrote:
On Sun, 06 Jan 2008 19:04:41 +1100, Trevor Wilson
wrote:

tony sayer wrote:
Enjoy....

http://dailymotion.alice.it/video/x3...pe-triode_tech
**Outstanding! Those whacky Frogs.

One question:

Why the yellow flame, before the blue flame on the glass?

So as not to crack the glass through too-intense local heating. Much
less risk if you bring it all up to a fairly high temperature before
getting serious with one bit.

**OK, that makes sense. Wouldn't holding the blue flame further away
achieve the same thing?

Trevor Wilson

--
Posted via a free Usenet account from http://www.teranews.com

Don't try this at home;!..
 

On Mon, 07 Jan 2008 06:28:10 +1100, Trevor Wilson
wrote:

Don Pearce wrote:
On Sun, 06 Jan 2008 19:04:41 +1100, Trevor Wilson
wrote:

tony sayer wrote:
Enjoy....

http://dailymotion.alice.it/video/x3...pe-triode_tech
**Outstanding! Those whacky Frogs.

One question:

Why the yellow flame, before the blue flame on the glass?

So as not to crack the glass through too-intense local heating. Much
less risk if you bring it all up to a fairly high temperature before
getting serious with one bit.

**OK, that makes sense. Wouldn't holding the blue flame further away
achieve the same thing?

I remember glass-blowing classes in school chemistry. We always used
the yellow flame for annealing. I think the gradients are just too
severe in the blue.

d

--
Pearce Consulting
http://www.pearce.uk.com

--
Posted via a free Usenet account from http://www.teranews.com

Don't try this at home;!..
 

Don Pearce wrote:
On Mon, 07 Jan 2008 06:28:10 +1100, Trevor Wilson
wrote:

Don Pearce wrote:
On Sun, 06 Jan 2008 19:04:41 +1100, Trevor Wilson
wrote:

tony sayer wrote:
Enjoy....

http://dailymotion.alice.it/video/x3...pe-triode_tech
**Outstanding! Those whacky Frogs.

One question:

Why the yellow flame, before the blue flame on the glass?

So as not to crack the glass through too-intense local heating. Much
less risk if you bring it all up to a fairly high temperature before
getting serious with one bit.
**OK, that makes sense. Wouldn't holding the blue flame further away
achieve the same thing?

I remember glass-blowing classes in school chemistry. We always used
the yellow flame for annealing. I think the gradients are just too
severe in the blue.

**'K. Thanks Don. The only other thing which stood out, was that the guy
had a superbly fitted out workshop, but used a Swiss Army Knife to cut
the plates. I'd have thought he would use a small guillotine.

Trevor Wilson

--
Posted via a free Usenet account from http://www.teranews.com

Don't try this at home;!..
 

On Mon, 07 Jan 2008 06:28:10 +1100, Trevor Wilson
wrote:

Why the yellow flame, before the blue flame on the glass?

So as not to crack the glass through too-intense local heating. Much
less risk if you bring it all up to a fairly high temperature before
getting serious with one bit.

**OK, that makes sense. Wouldn't holding the blue flame further away
achieve the same thing?

The blue flame further away wouldn't reach the work.

Don't try this at home;!..
 

On Jan 3, 6:53*pm, tony sayer wrote:
Enjoy....

http://dailymotion.alice.it/video/x3...ne-lampe-triod...
--

A long time ago I used to work for GEC. it was said that when they
stopped making valves they turned the factory over to making very
expensive wine glasses becuase it could make use of the same highly
skilled workforce and much of the equipment.

Robert